Refer to the drawing of a pneumatic control system (see figure below).
The purpose of the valve positioner is to convert…
A. a small control air pressure into a proportionally larger air pressure to adjust valve position.
B. a large control air pressure into a proportionally smaller air pressure to adjust valve position.
C. pneumatic force into mechanical force to adjust valve position.
D. mechanical force into pneumatic force to adjust valve position.
Show Answer
Answer: A
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